C - Chemistry – Metallurgy – 09 – J
Patent
C - Chemistry, Metallurgy
09
J
C09J 11/08 (2006.01) C08J 5/18 (2006.01) C09D 7/12 (2006.01) C09J 7/00 (2006.01) C09J 133/08 (2006.01) C08L 71/02 (2006.01)
Patent
CA 2219798
A water-based pressure sensitive adhesive formulation is provided with one or more high molecular weight linear aliphatic polymers. The resulting composition can be used to form stable filaments or delivered from the coating die of a premetered coater in the form of a stable sheet at a flow rate substantially less than the minimum delivery flow rate achievable using the formulation without polymer. Low levels of polymer can provide dramatic improvement in the viscosity of such compositions, without detrimental effect on the adhesive and other desirable qualities of the composition. Provided is a coating composition comprising a water-based pressure sensitive adhesive formulation, and a polymer additive comprising poly(ethylene oxide) polymers or copolymers having a molecular weight of at least 1,000,000 g/mole, wherein the polymer additive is present at a concentration of between 1 ppm and 1000 ppm. Also provided is a method for preparing the coating composition and a coated product comprising the composition.
L'invention porte sur une formulation auto-adhésive à base d'eau contenant un ou plusieurs polymères aliphatiques linéaires à haut poids moléculaire. La composition résultante peut être utilisée pour former des filaments stables ou elle peut être fournie à partir d'un doseur qui l'applique sous la forme d'un film stable à un débit sensiblement inférieur au débit minimum qui peut être obtenu en utilisant une formulation sans polymère. Les niveaux bas de polymère peuvent apporter des améliorations considérables au niveau de la viscosité de telles compositions, sans effets néfastes sur les qualités adhésives et d'autres qualités souhaitables de la composition.
Minnesota Mining And Manufacturing Company
Smart & Biggar
LandOfFree
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